It is always wise to use a little common sense before taking advice from others. I don't think people have to experience selling real estate to recommend products or services that might be useful to active practitioners, but I don't think they always have a clear understanding of our jobs, and they don't always make the best recommendations.
Case in point: A new product for the iPad was released in Apple's App Store. I have installed it on my iPad and tested it, and it does everything it is supposed to do. It is called Open Home Pro and it is free.
It serves as an electronic open-house sign-in book. It has been declared an innovative breakthrough and a must-have for agents who conduct open houses.